Why the study?
Respiration and heartbeat monitoring during sleep is essential for assessing personal health, but conventional monitoring systems are complex, expensive, and uncomfortable.
A novel macrobending small-core fiber sensor embedded in a mat provides a non-contact, low-cost alternative for long-term monitoring of vital signs during sleep.
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May enable unobtrusive home sleep monitoring; leaves open validation against polysomnography in clinical cohorts.
Respiration and heartbeat monitoring during sleep is essential in the assessment of personal health. However, conventional monitoring systems are complex, expensive, and uncomfortable. In this Letter, a mat embedded with a macrobending optical fiber sensor is proposed for non-contact vital signs monitoring during sleep based on vibration sensing. Exploiting the whispering gallery mode, a small-core fiber is adopted and pre-bent to enhance sensitivity to subtle vibrations. The mat sensing system can simultaneously detect and track respiration and ballistocardiography. With high vibration sensitivity, high reliability, and good stability, the mat provides a non-contact and low-cost alternative for long-term monitoring of vital signs, especially for daily home use.
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Zhao et al. (2021) studied this question.
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